.box .chart-content {
    width: 100%;
    height: 1000px;
    background-color: white;
    padding: 20px 40px;
    margin: 0 auto;
  }
  .box .chart-content h2 {
    font-size: 30px;
    text-align: center;
    font-weight: bold;
    margin-bottom: 40px;
  }
  .box .chart-content .dianya,
  .dianliu {
    width: 800px;
    height: 350px;
    margin: 40px auto;
  }
